Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

external/sdl/SDL/src/audio/wasapi/SDL_wasapi.h

@@ -0,0 +1,70 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_wasapi_h_
+#define SDL_wasapi_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    SDL_AtomicInt refcount;
+    WCHAR *devid;
+    WAVEFORMATEX *waveformat;
+    IAudioClient *client;
+    IAudioRenderClient *render;
+    IAudioCaptureClient *capture;
+    SDL_AudioStream *capturestream;
+    HANDLE event;
+    HANDLE task;
+    SDL_bool coinitialized;
+    int framesize;
+    int default_device_generation;
+    SDL_bool device_lost;
+    void *activation_handler;
+    SDL_AtomicInt just_activated;
+};
+
+/* win32 and winrt implementations call into these. */
+int WASAPI_PrepDevice(SDL_AudioDevice *_this, const SDL_bool updatestream);
+void WASAPI_RefDevice(SDL_AudioDevice *_this);
+void WASAPI_UnrefDevice(SDL_AudioDevice *_this);
+
+/* These are functions that are implemented differently for Windows vs WinRT. */
+int WASAPI_PlatformInit(void);
+void WASAPI_PlatformDeinit(void);
+void WASAPI_EnumerateEndpoints(void);
+int WASAPI_GetDefaultAudioInfo(char **name, SDL_AudioSpec *spec, int iscapture);
+int WASAPI_ActivateDevice(SDL_AudioDevice *_this, const SDL_bool isrecovery);
+void WASAPI_PlatformThreadInit(SDL_AudioDevice *_this);
+void WASAPI_PlatformThreadDeinit(SDL_AudioDevice *_this);
+void WASAPI_PlatformDeleteActivationHandler(void *handler);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SDL_wasapi_h_ */